1906457 has 4 divisors (see below), whose sum is σ = 2178816. Its totient is φ = 1634100.

The previous prime is 1906453. The next prime is 1906477. The reversal of 1906457 is 7546091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1906457 - 2² = 1906453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1906453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136169 + ... + 136182.

It is an arithmetic number, because the mean of its divisors is an integer number (544704).

2^1906457 is an apocalyptic number.

It is an amenable number.

1906457 is a deficient number, since it is larger than the sum of its proper divisors (272359).

1906457 is an equidigital number, since it uses as much as digits as its factorization.

1906457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272358.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1906457 is about 1380.7450887112. The cubic root of 1906457 is about 123.9963795336.

The spelling of 1906457 in words is "one million, nine hundred six thousand, four hundred fifty-seven".